Postfix is Wietse Venema's mail server that started life at IBM research as an alternative to the widely-used Sendmail program.

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postfix doesn't respond on 25 from external server

I am trying to set up postfix with dovecot. I can telnet to localhost 25 and send a message to accounts on the server. However, when I try to telnet to port 25 on this server from another server I ...
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Postfix: Can I configure it to *not* include original email on undeliverable?

The question's title says it all. Scenario: The Postfix server is used only for mail-relay; in the office back-end, we use hMailServer. Some hMailServer users have their emails auto-forwarded to ...
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How to send mail from a remote SMTP host?

I have Postfix suite installed locally on Ubuntu 10.10. I can send/receive mail to my local address, e.g. user@local.com. I'm given credentials to a remote mail server mailbox, e.g. ...